Combined square and bevel.



A. LINDSTROM. COMBINED SQUARE AND BEVEL.

APPLIOATIOH FILED AUG. 31, 191.0.

Patented May V16, 1911-.

TNI nanms Pn'zks cm, munmamu. n. c.

ANDREW LINDSTROM, OF SAN FRANCISCO, CALIFORNIA.

COMBINED SQUARE AND BEYEL.

Specification of Letters Patent.

Patented May 16, 1911.

Application filed August 31, 1910. Serial No. 579,822.

To all whom it may concern:

Be it known that I, ANDREW LINDs'rRoM, citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented certain new and useful Improvements inCombined Squares and Bevels, of which the following is a specification.

This invention relates to measuring instruments, and has particularreference to a combined square and bevel.

An object of this invention is to so form an instrument of this naturethat it may be used not only as a square and bevel, with levelingattachment, but also as a compass and dividers.

This invention comprehends an instrument of this character which isprovided with an adjustable blade adapted to be. secured in variousangles relative to the stock, and which can be projected longitudinallyfrom the stock to accommodate the device to the work to which it isapplied.

For a full understanding of the invention reference is to be had to thefollowing description and accompanying drawing in which Figure 1 is aperspective view of the im proved measuring instrument. Fig. 2 is a sideelevation of the same, partly in section. Fig. 3 is a detail sectionalview through one end of the instrument showing the centering device.Fig. 4 is a transverse section through the instrument on the line 4- 1of Fig. 2.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the accompanying drawingby the same reference characters.

Referring to the drawing the numeral 10 designates the stock which isrecessed or cut away in its opposite sides to form a reduced port-ion orweb 11. The web 11 is apertured adjacent its opposite ends for thereception of a pair of spirit tubes 12 and 13 which are oppositelymounted within the stock. The stock 10 is provided at one end with arecess 14 forming a forked end for the stock and within which aredisposed a pair of companion disks 15 and 16. The disks 15 and 16 areprovided with registering depressions extending from the centralportions of the disks to one side thereof to slidably receive anadjustable blade 17. The disk 16 is provided with a tongue 18 projectingfrom the inner face of the disk and within the indentation to engagewithin a longitudinal groove 19 formed in one side of the blade 17. Thetongue 18 is adapted to retain the blade 17 from detachment from thec0mpanion disks 15 and 16. The stock 10 is rounded at its forked-end toregister with the disks 15 and 16 and is provided with a transverse bolt20 for rotatably supporting the disks. The bolt 20 carries a thumb-nut21 upon its outer end engaging against one side of the stock 10 forbinding the fork sect-ions of the stock 10 against the outer faces ofthe disks.

The stock 10 is provided with a channel or pocket 22 in its lower edgecommunicating at its outer end with the recess 14 and adapted to-receive the lower end of the blade 17. The blade 17 is provided withopenings 23 in its opposite ends for the reception of a markinginstrument during the use of the device.

Thebolt 20 is provided with a central bore 2 1 through which extends acenterer 25. The centerer 25 is in the form of a relatively thin steinwhich is pointed at one end and which is enlarged and threaded at itsopposite end to engage in the correspondingly threaded outer end of thebolt 20. The centerer 25 carries a head 26 to receive the fingers of theoperator in turning the centerer 25. The head 26 extends into thecentral opening in the thumb-nut 21.

The disks 15 and 16 are held from rotation with respect to one anotherby the provision of a stud 27 engaging in threaded relation in the innerface of the disk 15 and fitting snugly into a correspondingly formedopening in the inner face of the opposite disk. The inner end of thestock 10 carries a fixed blade 28 which is seated therein to space theouter edge-of the blade 28 from the extremity of the stock so as todisclose the usual scale marked thereon. The blade 17 is limited in itsmovement within the channel or pocket 22 by a stop 29 in the form of aset-screw engaging through the inner wall of the channel 22 and havingits head within one of the recesses in the web 11. The stop 29 is thusadjusted to hold the blade in such position that at all times the outeredge of the blade will lie flush with the lower edge of the stock 10.From this construction it will be apparent that the blade 17 may beswung into various angles about the bolt 20 by releasing the thumb-nut21 and turning the disks 15 and 16. The stock 10 is provided with anindicating line 30 upon its upper face and across the fork sectionthereof adapted for registration with a circular scale of degrees 31marked upon the periphery of the disks 15 and 16 to indicate the angleat which the blade 17 is disposed.

Having thus described the invention what is claimed as new is 1. Asquare including a stock having a recess in one end and a channel in itslower edge communicating with the recess, companion disks mounted forrotation in the recess in the stock and having registering indentationsin their inner faces, one of the disks having an inwardly extendingtongue within the indentation, an adjustable blade engaging between thedisks in the indentations and having a longitudinal groove for thereception of said tongue, clamping means carried by the stock forholding the disks when adjusted, and a. fixed blade carried upon theopposite end of the stock.

2. A measuring instrument including a stock having a recess in one end,companion disks carried in the recess, an adjustable blade disposedbetween the companion disks, a clamping bolt engaging through the stockand the disk to rotatably support the same, said clamping bolt havingacentral bore and being internally threaded at one end,

a centerer engaging through the bore and having a correspondinglythreaded portion to engage therein, said centerer having a head forturning the same, and a clamping nut engaging over said clamping boltfor binding the same Within the stock and for housing the head of saidcenterer.

3. A square including a stock having a recess in one end and a channelin one edge communicating with the recess, a fixed blade carried in theopposite end of the stock, interlocking companion disks mounted in thestock within the recess and having registering indentations in theirinner faces, one of the disks having a tongue in the indentation, asliding blade engaging in the indentations and having a longitudinalgroove in one side for the reception of the tongue, a clamping boltdisposed through the stock and the companion disks to bind the slidingblade in adjusted position, and an adjustable stop carried by the stockwithin the channel for engagement with the sliding blade to limit itsswinging movement within the channel.

In testimony whereof I aflix my signature in presence of two witnesses.

ANDREW LINDSTROM. [L. s.] i/Vitnesses:

O. H. THoMPsoN,

AUGUST NELSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

